Burner



O. G.' HALVORSEN Oct. 14

lBURNER oi-iginal Filed July so Patented Oct. 14, 1924.

UNITED STATES PATENT OFFICE.

O'LE Gr. HALVORSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO NINSLOW BOILER & ENGI- NEERING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BURNER.

Application filed. July 30, 1920, Serial No. 400,187.

To all whom t may concern:

Be it known that I, OLE G. HALvonsnN, a citizen of the Kingdom of Norway, residing at Chicago, in the county of Cook, State of Illinois, having invented certain new and useful Improvements in Burners, do hereby declare that the following is a full, clear, and exact description of the same.

The invention relates to hydrocarbon burners for burning kerosene and fuel oils; and especially to means to produce a short wide flame with a highly combustible fuel mixture, and it consists in the matters hereinafter disclosed and pointed out in the claims.

In the accompanying drawings, which represent a practical embodiment of the features of my invention, Fig. l is a view in elevation showing the discharge end of the casing and the contour of the outlet for the flame;

Fig. 2 is a top plan view of the parts shown in Fig l, together with a portion. of the air-supply casing which is broken away, and

Fig. 3 is a transverse sectional view showing the flame outlet on the line 3 3 of Fig. 1.

In the drawings, in which like reference numerals indicate the same or corresponding parts in the several views, the numeral l represents an air supply casing of suitable form, in the present instance being substantially circular in cross-section, and directing the air for mixture with the atomized oil from the air-intake (not shown) to the mixing chamber 2 which is formed by the casing 3. The mixing chamber is substantially circu lar in cross-section at its line of juncture with the casing l, to which it is secured by the bolted flanges 4, and from thence it is somewhat dared outwardly in cross-sectional area toward the rear as clearly shown in Fig. 2 to provide an enlarged mixing space which also forms a combustion chamber. At the outer margin of the flared mixing chamber the upper and lower walls 5 and 6 of the casing are inwardly directed or inclined to reduce the vertical cross-sectional area of the discharge end of the chamber, and the side walls 7 are flaredy outwardly to enlarge its horizontal cross-sectional area, so that the flame outlet 8 is substantially rectangular in form or contour as shown in Figs. l,

2 and 3. The casing 3 has an external flange Renewed March 10, 1924.

9 by which it is attached to the inlet of any suitable fire pot (not shown).

The chamber 2 is provided with any suitable means (not shown) to atomize or vaporize the liquid hydrocarbon to enable it to readily mix with the air to form the combustible fuel mixture, which is suitably ignited, as by spark-plugs located in the openings 10.

As the flame outlet 8 is rectangular in form with its top and bottom walls inclined toward each other and its sides flared outwardly the flame is delivered to the fire pot in the form of a flat sheet or ribbon; in practice in some cases the outlet is about 4 inches high and 14 inches long, and as the area of the combustion chamber toward the outlet is gradually enlarged and greater than the area of the cross-section of the chamber 2 the flame is delivered from it in a stream that is wider and shorter than the usual long stream issuing from a circular outlet or one that is merely reduced in width, and so it is spread out to extend at once across the fire pot and fill its area` without requiring any means in the pot to spread it, and it is shorter and so occupies less longitudinal space. This relation of the combustion chamber and mixing chamber slows up the speed of the flow of the fuel and makes a shorter and wider flame. The flame varies with the head of the oil, the air delivered being sufficient only for complete combustion, any suitable means being employed to vary the amount of fuel fed to the burner on account of variations in conditions in the fire pot, and in all cases the voluminous flame .is spread! later-'ally toward the sides of the fire pot instead of being concentrated and directed in the center line thereof.

The outlet is here defined as rectangular in the sense that one of its diameters is greater than its other dia-meter, regardless of any particular contour of its peripheral portions or of the angles uniting them. In the particular arrangement shown the peripheral portions are straight and are joined at substantially right angles, but changes in these contours may be made within the scope of the invention so long as the fiat ribbon of llame is wider than the diameter of the mixing chamber.

I claim:

1. A liquid fuel burner comprising an air and oil mixing chamber, and a combustion chamber having` its top and bottom Walls inclined toward its center and its side Walls flared laterally to form a rectangular outlet, the construction of the tWo chambers being such that the area or' the combustion chamber is increasingly greater toward the outlet than the area olf the mixing` chamber.

2. A liquid fuel burner comprising a circular air and oil mixingl chamber flared outwardly in cross-sectional area toward its rear to form a combustion chamber and having its top and bottom Walls inclined toward its center and its side Walls flared laterally to form a rectangular outlet, the construction 15 of the two chambers being such that the area of the combustion chamber is increasingly greater toward the outlet than the area oi' the mixing chamber.

f OLE` G. HALVORSEN. Vitnesses:

J. MCROBERTS, HARRY S. HABNED 

